highly significantP = 0.001
P-Response Subgroup Statistical Analyses For this subgroup of infants, the amplitude differences over the P150–250 region were highly significant, F (1,10) = 29.307, P = 0.001, partial η 2 = 0.746, and observed power = 0.988, but not significant over the N250–550 time window ( P > 0.05) ( Figure 2 ). 3.2.2.